Machine for treating thin rubber articles



June 30, 1942. a. A. FINGADO arm.

MACHINE FOR TREATING THIN RUBBER ARTICLES 6 Sheets-Sheet l INVENTORS 4 ATTORNEY.

Filed July 1, 1939 June 30, 1942.

\ G. A. FINGADO ET AL MACHINE FOR TREATING THIN RUBBER ARTICLES Filed July 1, 1939 6 Sheets-Sheet 2 INVENTORS flan: Lad

Gu fa v BY 4. F/

W ego/(ATTORNEY June 1942- s. A. FINGAPO- ETAL 2,233,444

MACHINE FOR TREATING THIN RUBBER ARTICLES Filed Jui 1. 1939 6 Sheets-Sheet 3 INVENTOR 21.: L uaw/ BY GUI/av ,4. f/lryemo ATTORNEY June 30, 1942. s. A. FINGADQ Er-AL. 2,288,

MACHINE FOR TREATING THIN RUBBER ARTICLES v Filed July 1, 1939" 6 Sheets-Sheet 4 INVENTORS flan: Luz/9w BY lfmyada ATTORNEY June 30, 1942. G. A. FINGADO ETAL MACHINE FOR TREATING THIN RUBBER ARTIGLES Filed July 1, 1939 6 Sheets-Sheet 5 INVENTQRS J I TTORNEY.

June 30, 1942. e. A. FINGADO ETAL MACHINE FOR TREATING THIN RUBBER ARTICLES Filed July 1, 19:59

6 Sheets-Sheet 6 INVENTOR M in. BY QMTWW MWA'ITORNEY.

Patented June 30, 1942 MACHINE FOR TREATING THIN RUBBER ARTICLES Gustav A Fingado, Hoh

okus, and Hans Ludwig,

Ciiffside, 'N. J., assignors to Julius Schmid Ii'ic.,,

New York, N. Y.

Application July 1, 1939, Serial No. 282,449

1 Claim.

This invention relates to a machine for the treatment of thin tubular rubber articles and the like preferably formed from liquid latex but adopted for other uses as well.

The principal object of the invention is mechanically to eliminate the excess of latex which accumulates on the end of the clipping forms after the dipping operation.

With the foregoing and other objects in view as will appear as the description proceeds the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the embodiment of invention herein disclosed may be made within the scope of what is claimed and as more particularly indicated by the variations in scope of the claim.

In the accompanying drawings forming part of this specification:

Figure 1 is a side elevation of a machine embodying the invention.

Figure 2 is an incomplete plan view with certain parts left out to promote clarity.

Figure 3 is an end elevation of the machine.

Figure 4 is a plan section along the line 44 of Figure 3.

Figure 5 is an enlarged fragmentary view of the right hand upper portion of Figure 1.

Figure 6 is a fragmentary end section along the lines 56 of Figure 5.

Figure 7 is a side elevationof a particular mechanism within the machine, the frame being shown in dot and dash lines, the rest of the ma chine being omitted for the sake of clarity.

Figure 3 is a plan View of the mechanism shown in Figure 7.

Figure 9 is a detail of the clutch shown in Figure 8 illustrating pawl for holding clutch out of engagement Figures 10 and 11 illustrate the method by which the counterbalance is returned to starting position.

Figures 12 and 13 are detail views.

Generally described, the spinner apparatus of this invention receives the form-board b, Figure 1, which is slid endwise into the spinner.

The function of this apparatus is to eliminate through centrifugal action, an excess of latex which accumulates on the end of the forms after the clipping operation.

Should this excess be allowed to remain, it would cause an uneven top, and an objectionable tip or globule, of thick rubber on the article, and

from a commercial point of view, would lower the quality and saleability of the merchandise. The spinner consists of two guides into which the form boards are pushed alternately, but it is to be understood that a greater number may be employed, by certain modifications of the system. In the present machine, the guides are mounted upon a shaft (degrees) apart, which rotates 2 times in 4.8 seconds, which is sufficient to accomplish the purpose; however, this speed may be varied by the introduetion'of the proper gearing ratio in the mechanisms. When the spinner is at rest, a form board B (with forms downward) is pushed into the guide that is directly under the opposite guide, while a form-board (with forms upward) is pushed off the upper guide by the pusher mechanism of the transfer 'machine, and if for any reason the form boards are not completely pushed on or off the spinner,

'a safety device incorporated in the spinner mechanism operates to prevent damages to any of the actuating parts. The board that is pushed off of the spinner is transferred to a unit known as a push-up mechanism.

Spinner frame The machine includes in part a pair of standards 380, 38! secured to the sub-frame by bolts 382, having overhung portions 385, 335a provided with bearings 383, 384 respectively, wherein is journaled a shaft 336 provided at its ends with extensions 38'! and 388 for a purpose to be further described. Upon the shaft 386 is securely mounted within the confines of the portions 385 of the supporting member 33f a spinner frame 399, comprising a pair of end members constructed to include hubs 39!, 392 fixed to the shaft as by set screws or tapered pins 393, with radially disposed arms 394, at one end, and 396 at the opposite end, 180 (degrees) apart, terminating in a flanged portion 391, 3% adapted to have secured thereon by bolts 39% longitudinally disposed guide members 4353, it! the lowermost one 49! alternately becomes aligned with the transfer machine when the spinner is at rest.

The guide members 4%, till are constructed and suitably proportioned to freely receive the form-supporting boards 13, and retain same from radial displacement by cleats 4532 secured to the guide members in a position to slightly overlie the longitudinal edges of the form-board B; said board being yieldably retained from longitudinal edges of the form-board B; said board being yieldably retained from longitudinal displacement by a device 465 including a pressure roll 463 that has a pin connection 494 within a bifurcated end 406 of a rocker arm 401 that is pivotally mounted to a bracket 408 as at 409 secured upon the web member 4l0 of the guides 400, 40!.

The Web members are slotted as at 4!! permitting of the roll 403 to be moved therethrough, and to contact with the form-board 13 upon entering or leaving the supporting guide, the pressure exerted thereon is attained by a tension spring 4 !2 adjustable by a nut, co -acting with a screw 4!3 slidable in a bracket 4!4 secured to the guide members.

The rocking movement of the arm 401 upon which the roll is mounted is limited by an adjustable stop pin 4!6 threaded into a lug 4!1 integral with or otherwise secured to the bracket 408.

It is desired to provide a guard member at the receiving end of the spinner device, and for the purpose, a disc 420 is secured to the extension 381 of the shaft 386, having openings or notched portions in its peripheral surface to accommo date the entry of the form-boards B into the guides. A motion-checking device which as illustrated takes the form of a conventional mechanical brake 42!; the drum of which is keyed to the extension 381 of the shaft while the friction elements are pivotally secured as at 426 to the standard 380; the free ends thereof being adjustably held together by an adjusting bolt which provides suitable frictional contact upon the drum surface to aid in retarding the motion of the spinner at the end of each cycle of operation.

Intermittent drive mechanisms After withdrawal of the transferring pusher bars 359 and 365, the spinner 390 is made to revolve two and onehalf times, through :a spur gear 430 secured to extension 388 of the shaft 386, an intermediate gear 43! rotatable upon stub-shaft 429 secured to the frame member 385a, and the large driving gear 432; the latter is keyed to the end of a short shaft 433 j ournaled into a bearing 434 that is carried upon the standard 38!; the other end of the short shaft has secured thereon, one member 435 of a clutch device indicated generally by the numeral 436,

having squared jaws 431 adapted to freely cooperate with a corresponding clutch member 438 that is mounted and splined for axial movement upon a short shaft 439 journaled into an elongated bearing 44! of a standard 442; its opposite end has fixed thereon a pinion 443 coacting with a crank arm 444 having a rack portion 444a, held into meshing position therewith by a guide member 446 provided with suitable journaled lugs 441 bearing upon, and retained to the shaft 439 by a collar 448. The crank arm is reciprocated through the medium of a crank pin 449 secured to a pair of cranks 45!, one of which is keyed to a driving shaft 452 that is synchronized with the transfer mechanisms, while the supplemental crank has keyed therein an extension shaft 41! in co-axial relation with shaft 452.

The shaft 452 is driven through a gear reduction device 453 supported upon a standard 455, driven through miter gears 224a associated with the power shaft 224 that is driven through a sprocket 455a and chain 456!) from a counter shaft that is transversely supported upon the frame standard of an adjacent machine.

The intermittent driving means for the spinner frame 390, is attained through a cam 45|a having an 180 degree rise, and 180 degree swell,

secured to the shaft 41!, its peripheral cam surface co-acting with a cam roll 45lb that is urged into contact therewith through a spring 5!2 of the clutch device; said roll is secured by a pin 449a to a yoke member 446a. The lower end of the yoke is slotted as at 4410. to override the said shaft, while its upper end is held into vertical alignment therewith through a slot 441!) that overrides a guide post 439a provided with re taining collars 448a; the post is secured to a stationary member, such as the standard 38! of the machine frame.

A pair of curved arms 450, having pivotal connection to the yoke 446a as at 450a, are vertically extended therefrom, to actuate the arm 500 of the clutch yoke 506, through the pivot connection 505. The cam 45!a is so timed relative to the crank pin 449 that when the pin, and arm 444, is starting its upward movement from bottom dead center, the arms 450 will have been moved downwardly, by virtue of the rise of the cam 45Ia acting upon the roll 45w, causing the clutch device to become disengaged. Simu1- taneously, the spinner will be locked and prevented from further rotation, through. the ac tuation of the locking mechanisms upon disc 46! as described; and the transferring cycle will take place. I

It will be noted at this juncture that the portion MB of the arm 500 may be subjected to a non-return, or locked position, as shown in broken line (figure 245) by virtue of a safety latch device 52! to be later referred to, but in the present instance, it is to be understood that the stroke of the cam 45la is predetermined, and that during normal operation of the declutching mechanisms as herein described, the arm 500 is swung downwardly just short of the distance required whereby the device 52! can act thereon. At the instant the pin 449, and arm 444, has reached top dead center, to be reciprocated downwardly on the load stroke (reversing the direction of rotation of gears 430, 43!, and 432), the disc 46! becomes released from the lock lever 466, and simultaneously the clutch device will re-engage for an interval of one-half revolution of the shaft 452; whereupon the cycle is completed.

During the first half of the cycle (the spinner 390 being at rest), a form-board B is moved longitudinally into the lowermost guide of the spinner frame by the pusher bar 359, while at the same time, the pusher bar 365 will eject a form-board B from the uppermost guide of the said spinner frame.

Spinner positive positioning As best seen in Figure 6 the spinner shaft 336 has keyed thereon adjacent to the drive end, a positive positioning-disc 46! having formed upon its peripheral surface suitable notches 462 and 463 spaced degrees apart, adapted to receive a lip portion 464 provided at one end of a rock lever 466 pivotally fulcrumed by a pin 461 secured tothe frame portion 385a, the opposite end having a pivotal connection 438 with a cam rod 469, forked at its opposite end to override the cam shaft 41! which is rotated by the aforementioned cranks 45!; said shaft has keyed thereon a cam member 412 having peripheral cam surfaces upon which a cam roll 413 coacts to actuate the cam rod 469, through a pin connection 414. The roll 413 is urged into contact with the cam 412 by means of a tension spring 416, one end of which is secured to an arm 463 of the rock lever 465, while the other end is secured to a pin 41'! anchored to the frame standard 38!. It will be noted that the cam member 412 is constructed with an inner dwell surface 419 of about 176 (degrees) and accordingly, the cam is provided with a timing adjustment for advancing or retarding the action of the notchengaging lip 463. Such means include a recessed portion 48! in the side of the cam member body one-half the thickness thereof, having an arcuate slot 482, a segmental inset member 483 profiled to conform to the design of the cam, and bolts 484 coacting with the slot 482 to clamp the inset within the recess. The inset member 483 being shorter in length than the recess, adjustment may be made in either arcuate direction as required.

The spinner device 398 as herein shown is caused to rotate two and one-half times, whereupon the spinner becomes subjected to a rest period; which period is predetermined, and made positive by the action of the lock lever lip 453.

It is to be understood that the number of revolutions and the rate of speed thereof required to be made by the spinner, is contingent upon conditions pertaining to the solution or latex upon the forms A, and that the ratio of gearing may be easily and readily transformed.

It will also be noted that with each revolution of the cam 412, the to alternately engage the notches 462 and 463 respectively, which corresponds to the position of the spinner, relative to the transfer machine when loading and unloading the form supporting boards B, into, and from the spinner frame, respectively.

Automatic safety clutch throw-out As best seen in Figures and 6 automatic safety clutch-control mechanisms include in part a cam 498 secured to the common cam shaft 41!, cam roll 492 and cam bar 493, the latter being guided for vertical reciprocal movement through the medium of a slot (not shown) adjacent to one end which overrides the shaft 41!, while its opposite end is slidable within a guide 496 secured to the frame 422, and has secured thereto a cam block 49'! adapted to interlatch with a cam member 498 upon the free end of a connecting rod 499 pivotally co-acting as at 505 with one arm 580 of a rock lever 50! that is supported through a pin connection 502 upon a bracket 583 secured to the machine frame 38!. The other arm 554 of the rock lever is constructed to form a yoke 586 provided with pins 58! that are carried on a block member 598 removably secured in the yoke. The pins 59'! co-act with a shoulder 559 of a member 5!! associated with the slidable member 438 of the clutch, to move same to the right as viewed in Figure 5 against the compression of a coil spring 5! 2 that abuts a collar 5!3 secured on the shaft 439, to disengage the teeth of the clutch members when the connecting rod 493 is pulled downward by the cam rod 493 by virtue of the interlocked cams 49'! cam roll 492 is held into engagement with cam 499 by means of a tension spring 5!4 secured to a stationary member as indicated by the numeral 5!6, while the pendant rod 499 is urged into engagement position with cam rod 493 by a tension spring 5!! secured to the machine frame, and accordingly, when the pendant rod cam latch 498 is operatively engaged with the latch 49'! of the cam rod 493, it will be moved downward to disengage the clutch members locking lever will be actuated and 498. The

3 through the actio of cam 498 upon cam roll 492. While the clutch is thus disengaged, the end 5!8 of the rock lever 58! is acted upon by a locking device generally designated by the numeral 52! to prevent its upward return movement until the locking device has been released by the human hand of the operator.

As best seen in Figures 12 and 13, the device includes a dog 522 having an offset portion (not shown) fixed to a pintle (not shown) that is journaled on a supporting member 528 secured to the machine frame 422. A depending portion 529 carries a stop member 53! secured thereon to form a shoulder 532 at its lower end, relative to the extreme end 533 of the depending portion 529. The pintle has an extension 534 encircled by a torsion coil spring 536 one end of which is secured to a collar 53'! fixed to the free end of the pintle, while the other end of the coil is anchored into the adjacent ear 52'! of the supporting member. The device is positioned relative to the end 5!8 of the arm 59!) so that the stop 53! which forms the shoulder 532, is yieldably urged against the side of the cam-arm 458, which in turn bears against the end-portion 5!8, by virtue of the torsion spring 536 and pintle 524, when the arm is operatively positioned relative to the engaged clutch, but when the arm has been pulled downward to the inoperative position, the dog is permitted to be further rotated to snap the shoulder 532 over the top thereof, to an extent which is limited by the depending portion 533 contacting the side of the arm 458, and accordingly, the arm 58!! is held in this downward position, and will be prevented from returning to clutch-engaging position, until the safety locking device 52! has been manually released.

It will be noted that during the time that the pendant rod 499 is in the downward position, that its latching cam 498 has been positioned too for downward to be engaged by the cam rod latch 49'! which is being continuously reciprocated, and at each upward stroke of the cam rod 493, the cam 491 pushes the pendant rod 499 out of its path by means of the association of the inclined surfaces 54!, 542 of the rod 499 and cam 49'! respectively.

A guide member 543 secured to the frame 422 serves to keep the pendant rod 499 in'vertical alignment with cam rod 493 at all times.

Automatic safety mechanisms If for any reason a jam should occur in the spinner apparatus such as, for example, an incoming or an outgoing form supporting board B not clearing the ends of the guides 488, 48! of the spinner; i. e.: in the latter it may not be pushed into the guide far enough, or in the former it may be pushed too far and prevent rotation thereof, a safety mechanism is incorporated in the machine to prevent damage to any of the actuating members. With this in mind, during normal operations of the driving mechanisms as before described, a stop-finger is yieldably swung through a space, such space being that which is transversely of the path of travel taken by the board B just prior to its entry to the spinner guide from the transfer machine, and another stop-finger is made to function in a like manner relative to the path of travel taken by the outgoing board B when being ejected from the spinner.

These fingers are timed to be actuated into said path about (degrees) in advance of the spinner release lever 466. As best seen in Figures 2, 5, and 6, one of the fingers designated by the numeral 598 of a rock-lever 591 pivotally connected to a bracket 592 secured to the frame 385, is actuated through a pin connection 593 of a rod 594 which is pivotally connected as at 598 to the end of a rock-lever 591 secured to a common rock shaft 598 journaled into bearings 599, 681, 682 carried by standards 683, 684, 688 respectively, which are mounted upon and secured to the sub-base. The other finger 681 of a rock lever 888 pivotally connected to a bracket 689 by pin 61 1 secured to the frame, is actuated through a pin connection 612 of a rod 613 which is pivotally connected as at 614 to the end of a rocklever 616 secured to the rock shaft 598 intermediate to its ends.

The rock-shaft 598 is yieldably oscillated through the medium of a vertically disposed arm 611 (having an extension 518 to be presently described) secured upon its opposite end, having a pivotal connection 619 with a cam rod 62 I; said rod being slotted at the opposite end to override the cam shaft 411, by a heavy tension spring 628, one end of which is secured to the cam :bar 62! as indicated at 621, the other end having a connection with a pin 628 of a supporting member 829 secured to the machine standard 422.

At this juncture it will be interesting to note that due to the novel mechanical hook-up of the mechanisms just referred to, that the time period of oscillations of the shaft is controlled by the position of the cam roll 622 relative to the cam surface 623, i. e.: the roll is held away from. said surface by the fingers, through the several mechanisms, when the movement of either of the fingers toward the path of the board B is obstructed, but under normal operating conditions the roll 622 is made to follow the cam surface 823 through the medium of the heavy tension spring 626, whereupon the shaft 598 is caused to function continuously.

At the upper end of the extension 618 of arm 611 is pivotally connected by a pin 831, a cam bar 632 having its opposite end slidably supported in a bracket 633 secured to the frame 422. The bar 632 is suitably positioned adjacent to one edge of the aforementioned pendant rod 499 which carries at its lower end, the cam latch 498, to have a cam block 634 that is fixed thereon, co-act to dislodge the interlatching engagement of cam latch 491 and cam latch 498 when the bar is permitted to be moved to the right as viewed in Figure 5 and through (as before stated) the arm 618, cam rod 621 and tension spring 626.

From the foregoing description, including the clutch safety throw-out mechanisms, it will be seen that under normal operation of the parts, i. e.: there being no obstructions in the spinner apparatus, the pendant bar 499 will be acted upon, to disengaging position with cam rod 493 at each oscillation of the rock-shaft 598, and that the clutch 436 may retain its normal function, so long as the rockshaft 598 is permitted to function.

CcunterbaZancin-g mechanism It will be noted that when the board is pushed into the spinner frame, the mechanism is out of balance due to board being off center. When the mechanism spins, centrifugal force will cause destructive forces to be set up in the whole unit unless the board is counterbalanced during the spinning cycle. At the same time, when no board is in the spinner frame, the counterbalance must be kept out of action to prevent destructive strains in the mechanism. The device is so constructed, that if a board is pushed into the spinner frame to be spun around, the counterbalance is connected to the spinner frame and therefor counteracts the centrifugal forces set up by the board and, when no board enters the spinner frame the counterbalance is kept out of action during the spinning cycle. The mechanism is worked out as follows:

Attached to spinner shaft 388 on the patent drawings is sprocket 881 on the blueprint. Chain 882 connects sprocket 881 to sprocket 883, which in turn is keyed to shaft 884. Shaft 884 is supported by bracket 885. Chain 882 is kept tight by idler sprocket 888, lever 881 and rods 888. Sprocket 889 is keyed to shaft 884. Chain 818 connects sprockets 889 and 811 and is kept tight by idler 8 l 2, Bell lever 813 and rod 814. Sprocket 811 and straight jaw clutch 8i5 are one unit. The foregoing parts connect the spinner frame to the counterbalance shaft 826 which is supported in bracket 811. Clutch 865 can revolve freely on shaft 8%. Mounted on shaft 8%6 and also slidably splined to it is the other half of the clutch 858, backed up by spring andcollar 819 and 828 respectively. Keyed to shaft 816 is disc 821. Disc 88$ is fastened to counterbalance disc 822 by means of bolts. Disc 822 also supports the counterbalance weight 828 which is adjustable radially on rod 824 by means of nuts 825. Disc 822 is keyed to shaft 821 which is supported by bracket 811. Attached to shaft 821 is arm 829. Also mounted in bracket 8&1 is disc 838 which holds roller 831 thru pin 832. Disc 838 is keyed to shaft 833. Fastened to disc 838 is sprocket 834 which in turn is connected to sprocket 835 thru chain 888. Chain 838 is mounted on shaft 831 supported by brackets 838 and 839. Mounted on shaft 831 is cam 848 with an adjustable lobe 841, the cam keyed to the shaft. Also keyed to shaft 831 is sprocket 842. 842 is connected to sprocket 849 thru chain 844. Sprocket 843 is driven by reduction boX 845 thru shaft 848. Reduction box 845 also drives the transfer mechanism which slides the board into the spinner frame. Since the transfer and spinner reduction boxes are driven from a common shaft, they are always in time with one another, and therefor the interrelationship between the spinner, transfer and counterbalance can be maintained at all times. By following the mechanism thru it will be seen that the spinner shaft 386 rotates the counterbalance when the jaw clutch 818 is engaged with 815. Therefor if the spinner shaft drives the counterbalance, it can be seen that it is possible to have the board in the spinner frame and the weight in opposition so that the eccentric forces present during revolution can be neutralized. Following the cycle of a board thru the spinner frame, the operation of the mechanism is as follows:

When the board is pushed into the spinner frame by the transfer arm, the leading edge of the board comes in contact with arm 841 pinned to shaft 848 supported by brackets 849 and 849a. Lever 858 is also pinned to shaft 848. Attached to the end of lever 858 thru a stud is link 851. The other end of the link 851 is attached to latch 852 by means of a stud. Thus when the board comes in contact with the arm 841 it lifts the latch 852. Latch 852 is ordinarily in contact with yoke 853 which controls the motion of jaw clutch 818. When the board is being pushed into the spinner frame, cam 848 is so timed with the stroke of the transfer arm which moves the board, that the lobe 84! of the cam 8 39 comes in contact with the roller 85 i fastened to lever 855 thru stud for about one third the stroke of the board. Lever 855 is pinned to shaft 35! supported by bracket 85%; yoke etc is also pinned to shaft 85?; therefor when roller 35% comes in contact with lobe o l! it causes yoke 853 to move away from latch 352 about one sixteenth of an inch. It must be noted that the yoke see moves away from the latch 852 just before the board comes in contact with arm 86'! so that the latch may be lifted without hindrance. As long as the latch 85 2 is lifted out of contact with yoke 853, it is possible for spring 822 to push jaw clutch 858 into mesh with jaw when roller 854 rolls off lobe 8 A and so connect the spinner frame with the ccunterbaiancing mechanism as previ ously described. At the beginning of every spinning cycle it will be noted that the board is in the lower half of the spinner frame and therefor it will be necessary for the counterbalance weight 823 to be opposed or on the top of the circle. By means of a mechanism to be described subsequently, the counterbalance is in this position at the beginning of every spinning cycle and with the spinner frame makes two and one half revolutions during each spinning cycle. At the end of the spinning cycle it is necessary to disconnect the counterbalance from the spinner frame and this is accomplished by cam lobe 84!. For each spinning cycle, cam 840 makes one revolution and therefor when lobe 84! comes in contact wit roller 85-". just before the end of the spinning cycle, it pushes jaw Hi8 out of contact with jaw 3115 and so disconnects the spinner frame from the counterbalance weight 823. While a board is being pushed into the spinner frame, weight 823 must be returned to the top of the circle since, at the end of the spinning cycle the weight ends at the bottom of the circle. This is accomplished as follows:

Disc 830 is keyed to shaft 833 supported in bearing 85! which is part of bracket 8 l 1. Sprocket 834 is rigidly attached to disc 83!) and is connected sprocket 835 in a one to one ratio by means of chain 835. Sprocket 835 is keyed to shaft 83? which is supported by brackets 839 and 838. Since cam 843 is also attached to shaft 83'! it is timed with disc 830 in a one to one ratio. Arm 829 is keyed to shaft 821 which in turn is keyed to weight 823. Attached to disc 830 is a stud 8-32 supporting a roller 83l. The mechanism is so timed that when the end of the spinning cycle has been reached and the counterweight 823 at the bottom of the circle and therefor weight 823 is also hanging directly downward, roller B3l comes in contact with arm 829 and lifts the counterbalance to the upright position in one half revolution. One complete revolution of the disc 83!} corresponds to one board cycle or twice a spinning cycle since in one board cycle, the board must be pushed into the spinner and then put thru the spinning cycle. Since a board which has been spun is pushed out of the spinner frame on the top half of the frame while a board is being pushed into the lower half of the frame it will be understood why the board cycle does not include pushing the upper board off in addition to the above mentioned operations. When roller 83I comes in contact With arm 829,

- the spinner.

it must be noted that shaft 833 is not coaxial with shaft 821 but is located approximately three quarters of an inch above it, therefor roller 83! contacts arm 32:? at about one and one half inches from the end of the arm. When arm 829 reaches the top of the circie, roller 83.1 rolls off the end of the arm and. therefor leaves the arm 823 and consequently weight 823 at the top of the circle. also, shaft is located in a horizontal plane about one and one half inches away from the aXis of shaft so that during the spinning operation, arli 25! cannot come in contact with roller 335. It will be noted that the spinning operation occurs while roller 83! is on the downward stroke, while on the upward stroke of roller 233i, the arm is lifted. As noted above, the weight is left at the top of the circle. In order that it may be held in this position and not fall back to the bottom of the circle where it would be out of position for the spinning operation, the end of rod 32 is notched as at 863. When the notch reaches the top of the circle, roller 864 is pushed into notch 833. Roller 854 is supported in lever 835 by means of pin 8E6. Lever 8B5 pivots on shaft 851 supported by bracket 868 fastened to transfer frame 861a. Pinned to shaft 65'! is yoke 859 which forms a rigid backing for spring 81553. Spring 87!? surrounds spring rod 8H and the spring is put under compression by means of a washer bolstered by a cotter pin thru the rod 875. Locknuts 812 regulate the position of roller 86 with respect to the notch 853 on the counterweight shaft 324. The roller is so positioned as to just hold the counterweight from falling of its own accord when it is at the top of the circle and yet be free enough to offer no substantial impediment to the motion of the counterweight when it is in revolution. Thus it can be seen that the counterweight is always returned to the top half of the circle at the end of each spinning cycle and held there in readiness for the ensuing spinning cycle.

It is also necessary to describe the action of this mechanism in case a board is not pushed into Inasmuch as it has been previously stated what happens when a board is pushed into the spinner and what sequence of mechanisms takes place it will be noted that the entire action of placing the counterweight in action is controlled by arm 841. When arm 84'! is lifted by the board as it enters the spinner frame, the counterweight is connected to the spinner frame. Therefor it follows that if the arm is not lifted, the counterweight will not be connected and therefor will remain at the top of its circle of revolution. Hence no unbalanced weight will be spun which might cause damage to the spinning mechanism.

What is claimed is:

In a machine of the character described, a cylindrical spinner, a shaft extending longitudinally through the center thereof, form board guides extending longitudinally along the periphery of the spinner, a form board slidably mounted in each guide and capable of being ejected by the entry of a new board, forms mounted on the boards and extending radially with respect to the cylinder, and automatic means for spinning and stopping the cylinder.

GUSTAV A. FINGADO. HANS LUDWIG. 

